int VBoxNetLwipNAT::processGSO(PCPDMNETWORKGSO pGso, size_t cbFrame)
{
if (!PDMNetGsoIsValid(pGso, cbFrame,
cbFrame - sizeof(PDMNETWORKGSO)))
return VERR_INVALID_PARAMETER;
cbFrame -= sizeof(PDMNETWORKGSO);
uint8_t abHdrScratch[256];
uint32_t const cSegs = PDMNetGsoCalcSegmentCount(pGso,
cbFrame);
for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
{
uint32_t cbSegFrame;
void *pvSegFrame =
PDMNetGsoCarveSegmentQD(pGso,
(uint8_t *)(pGso + 1),
cbFrame,
abHdrScratch,
iSeg,
cSegs,
&cbSegFrame);
int rc = processFrame(pvSegFrame, cbSegFrame);
if (RT_FAILURE(rc))
{
return rc;
}
}
return VINF_SUCCESS;
}
/**
* @interface_method_impl{PDMINETWORKUP,pfnSendBuf}
*/
static DECLCALLBACK(int) drvNicNetworkUp_SendBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf, bool fOnWorkerThread)
{
PDRVNIC pThis = PDMINETWORKUP_2_DRVNIC(pInterface);
Nic_client *nic_client = pThis->nic_client;
AssertPtr(pSgBuf);
Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
/* Set an FTM checkpoint as this operation changes the state permanently. */
PDMDrvHlpFTSetCheckpoint(pThis->pDrvIns, FTMCHECKPOINTTYPE_NETWORK);
int rc;
if (!pSgBuf->pvUser)
{
Log2(("drvNicSend: pSgBuf->aSegs[0].pvSeg=%p pSgBuf->cbUsed=%#x\n"
"%.*Rhxd\n", pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, pSgBuf->cbUsed,
pSgBuf->aSegs[0].pvSeg));
rc = nic_client->send_packet(pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed);
}
else
{
uint8_t abHdrScratch[256];
uint8_t const *pbFrame = (uint8_t const *)pSgBuf->aSegs[0].pvSeg;
PCPDMNETWORKGSO pGso = (PCPDMNETWORKGSO)pSgBuf->pvUser;
uint32_t const cSegs = PDMNetGsoCalcSegmentCount(pGso, pSgBuf->cbUsed);
Assert(cSegs > 1);
rc = VINF_SUCCESS;
for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
{
uint32_t cbSegFrame;
void *pvSegFrame = PDMNetGsoCarveSegmentQD(pGso, (uint8_t *)pbFrame, pSgBuf->cbUsed,
abHdrScratch, iSeg, cSegs, &cbSegFrame);
rc = nic_client->send_packet(pvSegFrame, cbSegFrame);
if (RT_FAILURE(rc))
break;
}
}
pSgBuf->fFlags = 0;
RTMemFree(pSgBuf);
AssertRC(rc);
if (RT_FAILURE(rc))
rc = rc == VERR_NO_MEMORY ? VERR_NET_NO_BUFFER_SPACE : VERR_NET_DOWN;
return rc;
}
